Maintenance Object Repair Procedures
555-233-123
10-1828 Issue 4 May 2002
2. Issue the change system-parameters maintenance command. Check
the administered value(s) for TTRs and CPTRs for service on the Tone
Detector circuit packs or for CCRs on the Call Classifier Port (CLSFY-PT)
circuit pack. If a threshold value is set too high, change it to a lower value
via the change system-parameters maintenance command and wait one
minute for the alarm to clear.
To determine the correct TTR, CPTR, and Call Classifier port values, check
the total number of Tone Detector and Tone-Clock circuit pack and Call
Classifier circuit packs (TN744) currently in the system. A Tone Detector
circuit pack has two GPTD ports and four DTMR ports. A Call Classifier
circuit pack has eight ports. Verify that the total number of GPTD-PTs,
DTMR-PTs, and/or CLSFY-PTs in the system is greater than or equal to
their respective administered threshold values. If not, then you must either
(1) add more Tone Detector circuit packs and/or Call Classifier circuit packs
to the system as required or (2) reduce the threshold to match the number
in the system. If after (1) adding more Tone Detector circuit packs and/or
Call Classifier circuit packs or (2) reducing the threshold, the TTR Level
alarm is still present, then proceed to Step 3.
3. Execute the display error command. Look for a GPTD-PT, DTMR-PT, or
CLSFY-PT that has been busied out. A port that has been busied out has a
value of 18 in the error type field of the Hardware Error Log.
For each of the busied-out ports, use the following procedure:
■ Determine why the port was busied out.
■ If the port can be placed back into service, test the port via the test
port PCSSpp command.
■ If all the tests pass, release the port via the release port PCSSpp
command. Then wait one minute for the TTR Level alarm to clear.
If this does not clear the TTR Level alarm, proceed to Step 4.
4. Execute the display alarm command. Determine the address of the Tone
Detector circuit pack which contains the defective (alarmed) GPTD-PT or
DTMR-PT.
Execute the test board PCSS long rep 3 command where PCSS is the
address (that is, port network number, carrier designation, and slot
address) of the Tone Detector circuit pack or Call Classifier circuit pack
containing the defective (alarmed) GPTD-PT or DTMR-PT.
If this does not clear the TTR Level alarm, proceed to Step 5.
5. At this point, the only way to clear the alarm is to replace the Tone Detector
circuit pack or Call Classifier circuit pack containing the defective (alarmed)
GPTD-PT, DTMR-PT or CLSFY-PT.
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